@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@400;500;600;700&family=Rubik:wght@300;400;500;600;700&display=swap');

/* ===== CSS变量 ===== */
:root {
  --c-red: #ff0000;
  --c-pink: #ff006e;
  --c-dark: #1a1a2e;
  --c-darker: #0d0d1a;
  --c-cyan: #00ffff;
  --c-blue: #0080ff;
  --c-white: #f0f0f0;
  --c-muted: #8888aa;
  --c-glass: rgba(255,255,255,0.05);
  --c-glass-border: rgba(255,0,110,0.3);
  --nav-h: 64px;
  --font-main: 'Outfit', 'Rubik', system-ui, sans-serif;
  --radius: 4px;
  --transition: 0.25s ease;
}

/* ===== 全局重置 ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background: var(--c-darker);
  color: var(--c-white);
}

body {
  font-family: var(--font-main);
  line-height: 1.65;
  background: var(--c-darker);
  color: var(--c-white);
  overflow-x: hidden;
  min-height: 100vh;
}

img { max-width: 100%; display: block; }
a { color: var(--c-pink); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--c-cyan); }
ul, ol { list-style: none; }

/* scroll margin for sections */
article[id] { scroll-margin-top: calc(var(--nav-h) + 12px); }

/* ===== CRT扫描线覆盖层 ===== */
.crt-overlay {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0px,
    transparent 3px,
    rgba(0,0,0,0.12) 3px,
    rgba(0,0,0,0.12) 4px
  );
  animation: crt-flicker 8s infinite;
}

@keyframes crt-flicker {
  0%, 95%, 100% { opacity: 1; }
  96% { opacity: 0.92; }
  97% { opacity: 1; }
  98% { opacity: 0.95; }
}

/* ===== 顶部导航 ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-h);
  z-index: 1000;
  background: rgba(13,13,26,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,0,110,0.4);
  box-shadow: 0 2px 20px rgba(255,0,0,0.2);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 20px;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--c-white);
  flex-shrink: 0;
  min-height: 44px;
}
.brand-link:hover { color: var(--c-pink); }

.logo-img { width: 40px; height: 40px; object-fit: contain; }

.brand-name {
  font-family: var(--font-main);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-white);
  text-shadow: 0 0 8px var(--c-pink), 0 0 20px rgba(255,0,110,0.4);
}

/* 导航切换按钮（移动端） */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 1px solid var(--c-pink);
  border-radius: var(--radius);
  padding: 8px 10px;
  cursor: pointer;
  margin-left: auto;
  min-height: 44px;
  min-width: 44px;
  align-items: center;
  justify-content: center;
}
.hamburger-line {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--c-pink);
  transition: transform var(--transition), opacity var(--transition);
}

.primary-nav {
  margin-left: auto;
}

.nav-dl {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-brand-dt {
  display: none;
}

.nav-dl dt,
.nav-dl dd {
  display: inline-flex;
}

.nav-dl dd a {
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  min-height: 44px;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--c-white);
  border-radius: var(--radius);
  transition: color var(--transition), background var(--transition), box-shadow var(--transition);
  white-space: nowrap;
}

.nav-dl dd a:hover {
  color: var(--c-pink);
  background: rgba(255,0,110,0.1);
  box-shadow: 0 0 10px rgba(255,0,110,0.3);
}

/* ===== HERO ===== */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(255,0,0,0.15) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 20%, rgba(0,128,255,0.12) 0%, transparent 50%),
    linear-gradient(135deg, var(--c-darker) 0%, #0a0a1f 50%, var(--c-dark) 100%);
  padding-top: var(--nav-h);
}

/* 背景网格 */
.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,0,110,0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,0,110,0.07) 1px, transparent 1px);
  background-size: 50px 50px;
  animation: grid-scroll 20s linear infinite;
}
@keyframes grid-scroll {
  0% { background-position: 0 0; }
  100% { background-position: 50px 50px; }
}

/* hero内扫描线 */
.hero-scanlines {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0px,
    transparent 2px,
    rgba(0,0,0,0.08) 2px,
    rgba(0,0,0,0.08) 4px
  );
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: 60px 20px 120px;
  text-align: left;
}

.hero-eyebrow {
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.25em;
  color: var(--c-pink);
  text-transform: uppercase;
  margin-bottom: 20px;
  text-shadow: 0 0 10px var(--c-pink);
}

.hero-h1 {
  font-size: clamp(2rem, 6vw, 4.5rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--c-white);
  text-shadow: 0 0 30px rgba(255,0,0,0.5), 0 0 60px rgba(255,0,110,0.3);
  margin-bottom: 24px;
  max-width: 800px;
}

/* glitch效果 */
.glitch-text {
  position: relative;
}
.glitch-text::before,
.glitch-text::after {
  content: attr(data-text);
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}
.glitch-text::before {
  color: var(--c-cyan);
  animation: glitch-before 4s infinite;
  clip-path: polygon(0 20%, 100% 20%, 100% 40%, 0 40%);
}
.glitch-text::after {
  color: var(--c-pink);
  animation: glitch-after 4s infinite;
  clip-path: polygon(0 60%, 100% 60%, 100% 80%, 0 80%);
}
@keyframes glitch-before {
  0%, 85%, 100% { transform: none; opacity: 0; }
  86% { transform: translateX(-3px) skewX(2deg); opacity: 0.8; }
  88% { transform: translateX(3px) skewX(-2deg); opacity: 0.8; }
  90% { transform: none; opacity: 0; }
}
@keyframes glitch-after {
  0%, 88%, 100% { transform: none; opacity: 0; }
  89% { transform: translateX(3px) skewX(-2deg); opacity: 0.8; }
  91% { transform: translateX(-3px) skewX(2deg); opacity: 0.8; }
  93% { transform: none; opacity: 0; }
}

.hero-desc {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--c-muted);
  max-width: 600px;
  margin-bottom: 36px;
  line-height: 1.8;
}

.hero-cta-row {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.cta-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  min-height: 48px;
  font-family: var(--font-main);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  border-radius: var(--radius);
  transition: all var(--transition);
  cursor: pointer;
  border: 2px solid transparent;
}

.cta-primary {
  background: linear-gradient(135deg, var(--c-red), var(--c-pink));
  color: #fff;
  box-shadow: 0 0 20px rgba(255,0,0,0.5), 0 4px 15px rgba(255,0,110,0.4);
}
.cta-primary:hover {
  color: #fff;
  box-shadow: 0 0 35px rgba(255,0,0,0.8), 0 6px 25px rgba(255,0,110,0.6);
  transform: translateY(-2px);
}

.cta-secondary {
  background: transparent;
  border-color: var(--c-pink);
  color: var(--c-pink);
  box-shadow: 0 0 10px rgba(255,0,110,0.3), inset 0 0 10px rgba(255,0,110,0.05);
}
.cta-secondary:hover {
  background: rgba(255,0,110,0.1);
  color: var(--c-cyan);
  border-color: var(--c-cyan);
  box-shadow: 0 0 20px rgba(0,255,255,0.4);
}

/* 斜切底边 */
.hero-slice {
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 80px;
  background: var(--c-darker);
  clip-path: polygon(0 100%, 100% 0, 100% 100%);
  z-index: 3;
}
.hero-slice::before {
  content: '';
  position: absolute;
  top: -2px;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--c-red), var(--c-pink), var(--c-blue));
  box-shadow: 0 0 15px var(--c-pink);
}

/* ===== 主内容区 ===== */
#main-content {
  background: var(--c-darker);
  min-height: 60vh;
}

.content-section.with-sidebar {
  max-width: 1200px;
  margin: 0 auto;
  padding: 60px 20px;
  display: flex;
  gap: 32px;
  align-items: flex-start;
}

/* ===== 侧边栏（内容左侧）===== */
.sidebar-panel {
  flex: 0 0 220px;
  position: sticky;
  top: calc(var(--nav-h) + 20px);
  background: var(--c-glass);
  border: 1px solid var(--c-glass-border);
  border-radius: var(--radius);
  backdrop-filter: blur(10px);
  padding: 20px;
  box-shadow: 0 4px 30px rgba(255,0,110,0.1), inset 0 0 30px rgba(255,255,255,0.02);
  order: -1;
}

.sidebar-heading {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-pink);
  text-shadow: 0 0 8px var(--c-pink);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(255,0,110,0.3);
}

.sidebar-nav-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.sidebar-link {
  display: block;
  padding: 8px 10px;
  min-height: 40px;
  font-size: 0.875rem;
  color: var(--c-muted);
  border-radius: var(--radius);
  border-left: 2px solid transparent;
  line-height: 1.4;
  display: flex;
  align-items: center;
  transition: all var(--transition);
}
.sidebar-link:hover {
  color: var(--c-pink);
  border-left-color: var(--c-pink);
  background: rgba(255,0,110,0.08);
  text-shadow: 0 0 8px rgba(255,0,110,0.5);
}

.sidebar-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid rgba(255,255,255,0.08);
  font-size: 0.75rem;
  color: var(--c-muted);
}
.badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-cyan);
  box-shadow: 0 0 8px var(--c-cyan);
  animation: pulse-dot 2s ease-in-out infinite;
  flex-shrink: 0;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

/* ===== figure装饰 ===== */
.main-content-area {
  flex: 1;
  min-width: 0;
}

.content-figure {
  margin: 0 0 32px 0;
}
.figure-deco {
  display: flex;
  align-items: center;
  gap: 12px;
}
.deco-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--c-pink), transparent);
  box-shadow: 0 0 6px rgba(255,0,110,0.5);
}
.deco-label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.3em;
  color: var(--c-pink);
  text-shadow: 0 0 10px var(--c-pink);
}

/* ===== page.content 正文样式 ===== */
.page-content-wrap {
  color: var(--c-white);
}

.page-content-wrap h2 {
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--c-white);
  margin: 48px 0 12px;
  padding-top: 20px;
  text-shadow: 0 0 20px rgba(255,0,0,0.3);
  position: relative;
  padding-left: 16px;
}
.page-content-wrap h2::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 60%;
  background: linear-gradient(to bottom, var(--c-red), var(--c-pink));
  box-shadow: 0 0 8px var(--c-pink);
  margin-top: 10px;
}

.page-content-wrap h3 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--c-pink);
  margin: 28px 0 10px;
  text-shadow: 0 0 10px rgba(255,0,110,0.4);
}

.page-content-wrap p {
  font-size: 1rem;
  line-height: 1.8;
  color: #c0c0d8;
  margin-bottom: 16px;
}

.page-content-wrap ul,
.page-content-wrap ol {
  margin: 12px 0 20px 20px;
  color: #c0c0d8;
}
.page-content-wrap ul { list-style: none; }
.page-content-wrap ul li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 8px;
  line-height: 1.7;
}
.page-content-wrap ul li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--c-pink);
  text-shadow: 0 0 6px var(--c-pink);
}
.page-content-wrap ol li {
  margin-bottom: 8px;
  line-height: 1.7;
}

.page-content-wrap a {
  color: var(--c-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.page-content-wrap a:hover {
  color: var(--c-pink);
  text-shadow: 0 0 8px var(--c-pink);
}

.page-content-wrap strong, .page-content-wrap b {
  color: var(--c-white);
  font-weight: 700;
}

.page-content-wrap article {
  padding: 32px 0;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.page-content-wrap article:last-child {
  border-bottom: none;
}

.page-content-wrap table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 0.9rem;
}
.page-content-wrap th {
  background: rgba(255,0,110,0.15);
  color: var(--c-pink);
  padding: 10px 14px;
  text-align: left;
  border: 1px solid rgba(255,0,110,0.2);
  font-weight: 700;
}
.page-content-wrap td {
  padding: 10px 14px;
  border: 1px solid rgba(255,255,255,0.08);
  color: #c0c0d8;
}
.page-content-wrap tr:nth-child(even) td {
  background: rgba(255,255,255,0.02);
}

/* subtitle / subhead / desc 副标题 */
.page-content-wrap .subtitle,
.page-content-wrap .subhead,
.page-content-wrap .desc,
.page-content-wrap .lead,
p.subtitle, p.subhead, p.desc, p.lead {
  color: var(--c-muted);
  font-size: 1rem;
  line-height: 1.7;
  margin-bottom: 24px;
}

/* ===== 页脚 ===== */
.site-footer {
  background: linear-gradient(180deg, #0a0a1a 0%, var(--c-dark) 100%);
  border-top: 1px solid rgba(255,0,110,0.3);
  margin-top: 40px;
}

.footer-top-band {
  background: rgba(255,0,110,0.04);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  padding: 48px 20px;
}
.footer-top-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.footer-brand-block {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}
.footer-brand-name {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--c-white);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-shadow: 0 0 10px rgba(255,0,0,0.4);
}
.footer-brand-desc {
  font-size: 0.9rem;
  color: var(--c-muted);
  line-height: 1.7;
  max-width: 320px;
}

.footer-contact-block {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-contact-heading {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--c-white);
  margin-bottom: 4px;
  text-shadow: 0 0 10px rgba(255,0,0,0.3);
}
.footer-contact-sub {
  font-size: 0.9rem;
  color: var(--c-muted);
}
.footer-contact-email {
  font-size: 0.9rem;
  color: var(--c-pink);
}

/* footer nav区（三列dl） */
.footer-nav {
  padding: 40px 20px;
}
.footer-nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.footer-dl {}
.footer-dl-title {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-pink);
  text-shadow: 0 0 8px rgba(255,0,110,0.5);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255,0,110,0.25);
}
.footer-dl dd {
  margin-bottom: 8px;
}
.footer-dl dd a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  font-size: 0.9rem;
  color: var(--c-muted);
  transition: color var(--transition), text-shadow var(--transition);
}
.footer-dl dd a::before {
  content: '→ ';
  margin-right: 6px;
  color: rgba(255,0,110,0.4);
  transition: color var(--transition);
}
.footer-dl dd a:hover {
  color: var(--c-white);
  text-shadow: 0 0 8px rgba(255,255,255,0.3);
}
.footer-dl dd a:hover::before {
  color: var(--c-pink);
}

/* footer底栏 */
.footer-bottom-bar {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px 20px;
  border-top: 1px solid rgba(255,255,255,0.06);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--c-muted);
}
.footer-copy {}
.footer-bottom-links {
  color: rgba(255,255,255,0.3);
}

/* ===== 动效 ===== */
@media (prefers-reduced-motion: no-preference) {
  .sidebar-panel {
    animation: fade-up 0.6s ease both;
  }
  .hero-h1 {
    animation: fade-up 0.7s 0.1s ease both;
  }
  .hero-desc {
    animation: fade-up 0.7s 0.25s ease both;
  }
  .hero-cta-row {
    animation: fade-up 0.7s 0.4s ease both;
  }
}
@keyframes fade-up {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ===== 移动端 ===== */
@media (max-width: 900px) {
  .content-section.with-sidebar {
    flex-direction: column;
  }
  .sidebar-panel {
    position: static;
    flex: none;
    width: 100%;
    order: 0;
  }
  .footer-top-inner {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .footer-nav-inner {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }
}

@media (max-width: 680px) {
  .nav-toggle { display: flex; }

  .primary-nav {
    display: none;
    position: fixed;
    top: var(--nav-h);
    left: 0;
    right: 0;
    background: rgba(13,13,26,0.98);
    border-bottom: 1px solid rgba(255,0,110,0.3);
    padding: 16px 20px;
    z-index: 999;
  }
  .primary-nav.is-open {
    display: block;
  }
  .nav-dl {
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
  }
  .nav-brand-dt {
    display: block;
    font-size: 0.7rem;
    color: var(--c-muted);
    letter-spacing: 0.15em;
    padding: 0 10px 8px;
    text-transform: uppercase;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    margin-bottom: 8px;
    width: 100%;
  }
  .nav-dl dd { width: 100%; }
  .nav-dl dd a {
    width: 100%;
    padding: 12px 10px;
  }

  .hero-content {
    padding: 40px 20px 100px;
  }

  .footer-nav-inner {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .footer-bottom-bar {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .content-section.with-sidebar {
    padding: 32px 16px;
  }
}

@media (max-width: 375px) {
  .hero-h1 { font-size: 1.75rem; }
  .cta-btn { width: 100%; }
  .hero-cta-row { flex-direction: column; }
}

button[aria-expanded]{min-width:44px;min-height:44px}